RVF: Told to look at fixation point and image flashed for 0.1 seconds. Participant could say the object and identify the object in the RVF/find the object with the right hand, but cannot draw the object.

LVF: Told to look at fixation point and image flashed for 0.1 seconds. Participant could draw the object with their left hand, find the object using their left hand and identify the object in the LVF, but could not say the object.

Two Visual Fields: Told to look at fixation point and images flashed for 0.1 seconds. Participant could say object in RVF and draw what is in the LVF, but cannot draw what is in the RVF or say what is in the LVF.

Composite Words: Told to look at fixation point and words flashed for 0.1 seconds. Participant could say what is in the RVF and draw what is in the LVF, but could not draw what is in the RVF, draw what is in the LVF, or form a composite word

Tactile (One Hand)

Right hand: Given object in hand behind a screen and asked to identify it. Participant could find the object using the right hand, but cannot draw the object, say the object, or find the object in the left hand.

Left hand: Given object in left hand behind a screen and asked to identify it. Participant could find/find the object with the left hand but could not say the object

Tactile (Both hands): Given objects in both hands behind a screen and asked to identify them. Participant could find the object in the right hand using the right hand and find the object in their left hand using their left hand, but could not find the object in their right hand with their left hand or find the object in their left hand with their right hand

Tests Of The Right Hemisphere: Can solve simple mathematical problems, can sort objects by shape/size/texture, can pick out semantically similar objects, and can blush or giggle when shown a nude picture, but can't explain why.

Screen=Tachistoscope

Evaluation

Psychology as a science: Laboratory experiment, falsifiable hypothesis, but collected qualitative data and no manipulation of IVs

Usefulness: Shows what hemispheres are responsible for, but corpus callosum cannot be fixed so has no real applications

Nature/Situational explanations/Determinism: Behaviours caused by disconnection of the corpus callosum

Reductionism: Behaviours only caused by corpus callosum being servered

Ethical considerations: Informed consent, confidential and no harm to participants

Corpus Callosum: Section down the centre of the brain that allows communication between hemispheres

Epilepsy: A tendancy to have recurrent seizures

Grand mal: Most severe form of epilepsy that involves uncontrollable seizures. This can be treated by the severing of the corpus callosum (disconnection/deconnection/split brain procedure/commissurotomy)

Lateralisation of function:Cognitive processes are more dominant in one hemisphere than the other

Sample

Opportunity sampling technique

California, USA

Males and females

11 split brain patients

Aim: To investigate the effects of disconnection of the corpus callosum

Prediction: Information from one hemisphere is not accessible by the other hemisphere